(流机风机)中英文摘要.doc

流机所风机文章 文章一 多级离心鼓风机高效模型级数值仿真与试验研究 摘要：本文对多级离心鼓风机的5个基本模型级在不同进口流量工况下的内部三维粘性定常流动和气动性能进行了数值预测，并以5个基本模型级进行试验、验证研究,此外对试验方法、试验结果展开讨论。 关键词：多级离心鼓风机；模型级；数值仿真；试验研究 于跃平1 张春梅2 董帆1 王鹏量1 陈启明1 胡四兵1 饶杰1 黄文俊1 合肥通用机械研究院 ,安徽合肥230031 2.西安交通大学,陕西西安 710049 ABSTRACT: Three dimensional steady viscous flow and aerodynamic performance of five basic stage models for multi-stage centrifugal blower operating at different inlet flow rates have been numerically investigated in this paper, and an experiment study based on five basic stage models was carried out to verify the numerical research. Moreover，the test method and the result has been analyzed. Key Words: multistage centrifugal blower; model stage; numerical simulation; experiment research Yu Yueping1; Zhang Chunmei;2 Dong Fan1; Wang Pengliang1; Chen Qiming1; Hu Sibing;1 Rao Jie1; Huang Wenjun1 1.Hefeu General Machinery Research Institute,Hefei,230031,China 2.Xi’an JiaoTong University,Xian,710049,China 文章二 汽轮机低压级湿蒸汽凝结流动的分相模型三维数值研究 摘要：使用分相模型方法，考虑了湿蒸汽两相凝结流动中相间速度滑移、耦合和湍流作用，对某汽轮机低压级进行了三维数值研究，结果表明：该级的自发凝结现象主要发生在静叶通道内；不同叶高的处的压降差别引起自发凝结情况的较大变化；端壁对汽液两相流动有着不同的影响。分相模型能够更精确地模拟湿蒸汽两相凝结流动并获得更多的流场参数，从而更好地揭示透平级内的湿蒸汽流动特性。 Abstract 关键词：汽轮机；湿蒸汽；凝结流动；分相模型；数值研究 董帆 王鹏亮 朱晓农 田奇勇 于跃平 合肥通用机械研究院,安徽合肥230031 ABSTRACT: The wet steam flow with condensation in an LP turbine stage was numerically analyzed with the inhomogeneous model allowed for the velocity slip and coupling between the two phases and the turbulence diffusion. The results showed that the spontaneous nucleation occured mainly in the stator passage; the spanwise difference of the pressure drop caused considerable variation of condensation; the end walls took different effect on the flow between the phases. The inhomogeneous model provided more accuracy and parameters in modeling the wet steam two-phase flow with condensation and thus gave a better understanding of the its flow characteristic in a turbine stage. Key Words: steam turbine; wet steam; condensing flow; inhomogeneous model; numerical